Crashes

[uid0-33_(_at_)_catastrophe_(_dot_)_net]

I have a machine that is crashing (i.e. the keyboard locks up at the
console and nothing happens). What is the best way for me to determine
the root of the problem and help get it patched? Doing the normal core
analysis won't work as the machine can't be accessed at all during
this "hang".

The only thing I've seen is a stray interrupt on irq 7, but that was
only once, and this has happened a few times.

Thanks.

-#0